Daily viariations of geomagnetic H, D, and Z were studied for an average of five international quiet days in March 1967, and for one particular day (March 6, 1967) when a spectacular near-noon counter-electrojet occurred at Trivandrum (about 30 km south of the dip equator) and Kodaikanal and Annamalainagar (about 170 and 290 km north of the dip equator) in the Indian zone. For the average quiet days the electrojet seemed to be centered near the dip equator in the morning but shifted steadily southward over Trivandrum and beyond by evening. For the near-noon counterelectrojet day, single current systems flowing more than 100 km to the north of the dip equator and/or double current systems, one normal near the dip equator and another in reverse, about 100 km or more to the north were indicated. |